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1. 发明专利

JP2002202340A METHOD FOR EVALUATING WATER TREE GENERATION TYPE OF CV CABLE 失效
公开(公告)号：JP2002202340A
公开(公告)日：2002-07-19
申请号：JP2000402637
申请日：2000-12-28
申请人： FUJIKURA LTD , CHUBU ELECTRIC POWER
发明人： KON HIROYUKI , WATANABE KAZUO , UCHIDA KATSUMI , MIYAJIMA KAZUHISA
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To solve the problem that it is difficult to accurately grasp the water tree generation type of the whole cable since when the water tree generation type of a cable insulator is investigated, part of the cable is sampled for the investigation and then the investigation result depends upon the sampling place. SOLUTION: The CV cable after being electrified with a DC voltage is grounded and then electrified with an AC voltage to measure the residual electric charges. By this method, AC voltage electrification based upon a specific electrification pattern is repeated in steps and the water tree generation type of the cable insulator is evaluated by using a distribution of residual electric charge quantities measured in the steps of the AC voltage electrification.

2. 发明专利

JP2000074981A Method for measuring residual electric charge in diagnosing insulation of power cable 审中-公开
标题翻译：电力电缆诊断绝缘电阻测量方法
公开(公告)号：JP2000074981A
公开(公告)日：2000-03-14
申请号：JP24750098
申请日：1998-09-01
申请人： Chubu Electric Power Co Inc , Fujikura Ltd , 中部電力株式会社 , 株式会社フジクラ
发明人： KON HIROYUKI , YOSHIDA MANABU , WATANABE KAZUO , TODA TSUNEO , NARUSE MITSUTO
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To make the charging facility scale reducible, make apparatuses of the facility simplifiable and particularly enhance the effectiveness as an insulation diagnosis method on a spot by impressing a damped oscillation voltage after impressing a d.c. or an impulse and measuring a residual electric charge.
SOLUTION: In measuring a residual electric charge when diagnosing water tree deterioration of a CV power cable or the like, for example, a test cable 1 is grounded after a d.c. is impressed thereto, and then a damped oscillation wave voltage is impressed from a damped oscillation wave voltage-generating apparatus 3 in a state with a residual electric charge-measuring apparatus 7 connected to the cable. Since the residual electric charge is not detected even when measured by impressing a predetermined a.c. after the damped oscillation wave voltage is impressed, it is confirmed that the residual electric charge is emitted by the damped oscillation wave voltage. The damped oscillation wave voltage can be generated, e.g. by charging a capacitor 4 and discharging via an inductance 5. An apparatus for generating the damped oscillation wave voltage can be small in facility scale and can be carried on a small truck or the like and therefore, the apparatus is appropriate for use on a spot.
COPYRIGHT: (C)2000,JPO
摘要翻译：要解决的问题：为了使充电设施可缩小，通过在施加直流电压之后施加阻尼的振荡电压，使设备的设备简化并且特别地提高作为绝缘诊断方法的有效性。或脉冲并测量剩余电荷。解决方案：在诊断CV电力电缆等的水树恶化时测量残留电荷，例如，测试电缆1在直流电源后接地。并且在与电缆连接的残留电荷测量装置7的状态下，从阻尼振荡波电压产生装置3施加阻尼振荡波电压。由于即使通过施加预定的交流电来测量剩余电荷，也没有检测到。在施加阻尼振荡波电压之后，确认通过阻尼振荡波电压发出残留电荷。可以产生阻尼的振荡波电压，例如通过对电容器4进行充电并通过电感5进行放电。用于产生阻尼振荡波电压的装置可以在设备规模上小，并且可以在小型卡车等上运载，因此该装置适合在现场使用。

3. 发明专利

JPH1198672A TREATMENT METHOD FOR OUTER SEMICONDUCTOR LAYER OF CV CABLE 失效
公开(公告)号：JPH1198672A
公开(公告)日：1999-04-09
申请号：JP26802397
申请日：1997-09-12
申请人： FUJIKURA LTD , CHUBU ELECTRIC POWER
发明人： TAKAHASHI YASUHIRO , WATANABE KAZUO , KATO YOICHI , YOSHIZAWA HIDEFUMI
IPC分类号： H02G1/14 , H02G15/02 , H02G15/08
摘要： PROBLEM TO BE SOLVED: To prevent the end of an outer semiconductor layer from separating by a method, wherein the operation for the end part tearing off is finally elimi nated of the removal of the outer semiconductor layer. SOLUTION: A cut in 182 is formed from a position B which is ahead of a predetermined position A (the position of the end of an outer semiconductor layer) by just a distance (e) (5-10 mm) toward the front end. Then the semiconductor layer is penciled to the position A down from a position C behind the position A. At the same time, the outer semiconductor layer 18 between the position A and a position D ahead of the position A just by a distance (g) (approximately 50 mm). At that time, a cable insulation 16 is made to be exposed between the positions A and B. Then the outer semiconductor layer 18 is removed therefrom. With this constitution, since the end of the outer conductor is not torn off, the separation of the end of the outer semiconductor layer will not occur.

4. 发明专利

JPS5749309A Method of removing strand insulating fim from pof cable 失效
标题翻译：从POF电缆去除带状绝缘膜的方法
公开(公告)号：JPS5749309A
公开(公告)日：1982-03-23
申请号：JP12327580
申请日：1980-09-05
申请人： Fujikura Ltd , Chubu Electric Power
发明人： GOMI YOSHIAKI , HIRATA NOBUHIRO , WATANABE KAZUO , MOUTAI TSUNEAKI , YOSHIDA SHIYOUTAROU
IPC分类号： H02G1/12

5. 发明专利

JP2002202341A METHOD FOR DIAGNOSING INSULATION OF CV CABLE 失效
公开(公告)号：JP2002202341A
公开(公告)日：2002-07-19
申请号：JP2000402647
申请日：2000-12-28
申请人： FUJIKURA LTD , CHUBU ELECTRIC POWER
发明人： KON HIROYUKI , WATANABE KAZUO , UCHIDA KATSUMI , MIYAJIMA KAZUHISA
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To solve the problem that it is difficult to decide whether a cable has slight water tree deterioration uniformly or excessive water tree deterioration, i.e., a long water tree locally since the residual electric charge quantity obtained by a conventional residual electric charge measuring method is the total electric charge quantity from the cable lengthwise direction. SOLUTION: The cable to be tested after being electrified with a DC voltage is grounded and then electrified with an AC voltage and the residual electric charges are measured. By this method, the electrifying voltage value of the DC electrification is varied in order from a low-voltage to a high-voltage side, and the residual electric charge measurement is repeated; and the degree of water tree deterioration of the tested cable is diagnosed from the DC electrifying voltage value when the residual electric charges are measured.

6. 发明专利

JP2001349924A REMAINING LIFE ESTIMATING METHOD OF CV CABLE 失效
公开(公告)号：JP2001349924A
公开(公告)日：2001-12-21
申请号：JP2000175057
申请日：2000-06-12
申请人： FUJIKURA LTD , CHUBU ELECTRIC POWER
发明人： KON HIROYUKI , WATANABE KAZUO , UCHIDA KATSUMI , KATO YOICHI
IPC分类号： G01R31/12 , G01R29/24
摘要： PROBLEM TO BE SOLVED: To provide a method of accurately evaluating development of a water tree and the remaining life of a cable after a diagnosis regardless of cable length, because a conventional degradation diagnosing method handles an average amount from the cable and thus degradation diagnosis of long-sized cables or cables with different length is difficult. SOLUTION: In this remaining life estimating method, alternating voltage application having a predetermined application pattern, as alternating voltage application in a residual charge measurement of the cable is performed a plurality of times stepwise, and insulation degradation is diagnosed based on a maximum alternating application voltage value for measuring a residual charge. This diagnosis is performed every predetermined period to provide relation information between time and the longest length of the water tree, a characteristic curve is produced based on this information, and the life of the test cable is evaluated based on this characteristic curve.

7. 发明专利

JP2001349922A DEGRADATION DIAGNOSING METHOD OF CV CABLE 失效
公开(公告)号：JP2001349922A
公开(公告)日：2001-12-21
申请号：JP2000175053
申请日：2000-06-12
申请人： FUJIKURA LTD , CHUBU ELECTRIC POWER
发明人： KON HIROYUKI , WATANABE KAZUO , UCHIDA KATSUMI , KATO YOICHI
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To provide a method capable of accurately evaluating degradation degree of cable regardless of cable length in a diagnosis of water tree insulation degradation of a CV cable using a residual charge measuring method. SOLUTION: In this insulation degradation diagnosing method, the CV cable is applied with direct voltage, then grounded, and then applied with alternating voltage, and a residual charge is measured. Alternating voltage application having a predetermined application pattern is performed a plurality of times stepwise, an alternating breakdown voltage level of a test cable is estimated based on a maximum alternating application voltage value for measuring the residual charge to diagnose insulation degradation.

8. 发明专利

JP2002202342A METHOD FOR DIAGNOSING INSULATION OF CV CABLE 失效
公开(公告)号：JP2002202342A
公开(公告)日：2002-07-19
申请号：JP2000402650
申请日：2000-12-28
申请人： FUJIKURA LTD , CHUBU ELECTRIC POWER
发明人： KON HIROYUKI , WATANABE KAZUO , UCHIDA KATSUMI , MIYAJIMA KAZUHISA
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To provide a method which can accurately evaluate the degree of deterioration regardless of cable length and can also accurately evaluate the degree of deterioration between cables having different voltage classes when the water tree deterioration of a CV cable is diagnosed by using a residual electric charge measuring method. SOLUTION: By the residual electric charge measuring method, AC voltage electrification based upon a specific electrification pattern is repeated in steps and the degree of the water tree deterioration is diagnosed by using as an index the ratio of the maximum AC electrification electric field intensity when the residual electric charges are measured and the insulator thickness of the tested cable.

9. 发明专利

JP2001318117A MEASURING METHOD FOR RESIDUAL, CHARGE OF CV CABLE 失效
公开(公告)号：JP2001318117A
公开(公告)日：2001-11-16
申请号：JP2000138789
申请日：2000-05-11
申请人： FUJIKURA LTD , CHUBU ELECTRIC POWER
发明人： KON HIROYUKI , WATANABE KAZUO , UCHIDA KATSUMI , KATO YOICHI
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To provide a residual-charge measuring method in which a required power-supply capacity can be suppressed and whose measurement precision can be enhanced when a residual charge is measured in the diagnosis of the insulation degradation of a CV cable. SOLUTION: In the method, a DC voltage is applied to a cable insulator to which the diagnosis of the insulation degradation of the CV cable is executed, the cable insulator is grounded, and an AC voltage is applied so as to measure the residual charge. The AC voltage which is applied is an AC voltage whose frequency is at a commercial frequency or less.

10. 发明专利

JP2000081459A DIAGNOSTIC METHOD FOR INSULATION DETERIORATION OF POWER CABLE 失效
公开(公告)号：JP2000081459A
公开(公告)日：2000-03-21
申请号：JP25273798
申请日：1998-09-07
申请人： FUJIKURA LTD , CHUBU ELECTRIC POWER
发明人： KON HIROYUKI , YOSHIDA MANABU , WATANABE KAZUO , TODA TSUNEO , NARUSE MITSUTO
IPC分类号： G01R31/12
摘要： PROBLEM TO BE SOLVED: To provide a method for use in the diagnosis of the insulation deterioration of a CV cable through the measurement of residual charge, capable of evaluating the degree of deterioration by detecting the area of deterioration caused by water trees in the longitudinal direction of the cable. SOLUTION: In this diagnostic method, when the insulation deterioration of a CV cable 1 is diagnosed by grounding the CV cable 1 after application of a dc voltage thereto, and measuring residual charge while applying an ac voltage thereto, heating is effected in the longitudinal direction of the cable and the residual charge measurement is taken to specify the area of the insulation deterioration.

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